1/f fluctuations under acoustic cavitation of liquids

被引：16

作者：

Skokov, VN ^{[1
]}

Koverda, VP ^{[1
]}

Reshetnikov, AV ^{[1
]}

Vinogradov, AV ^{[1
]}

机构：

[1] Russian Acad Sci, Ural Branch, Inst Thermal Phys, Ekaterinburg 620016, Russia

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2006年 / 364卷

基金：

俄罗斯基础研究基金会;

关键词：

self-organized criticality; acoustic cavitation; 1/f fluctuations; noise; power spectra; nonequilibrium phase transitions;

D O I：

10.1016/j.physa.2005.09.045

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A regime of a generation of fluctuations with 1/f power spectra under cavitation of liquids in an ultrasonic field has been found experimentally. The acoustic cavitation is accompanied by the formation of various spatial structures and scale-invariant distribution functions of fluctuations. It has been shown that local fluctuations can have non-Gaussian distribution. A two-dimensional distributed parameter system of stochastic equations describing interacting nonequilibrium phase transitions has been investigated numerically. It has been shown that the system in a wide range of changing initial conditions and the intensity of external noise is characterized by the 1/f behavior of power spectra and scale-invariant distribution functions of fluctuations. The results of numerical simulation agree qualitatively with the experimental data. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：63 / 69

页数：7

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